diff --git a/orchestra/contrib/history/admin.py b/orchestra/contrib/history/admin.py
index ebd80e46..bc32e734 100644
--- a/orchestra/contrib/history/admin.py
+++ b/orchestra/contrib/history/admin.py
@@ -1,12 +1,14 @@
 from django.contrib import admin
-from django.utils.translation import ugettext_lazy as _
-from django.urls import reverse, NoReverseMatch
-from django.contrib.admin.templatetags.admin_urls import add_preserved_filters
-from django.http import HttpResponseRedirect
-from django.contrib.admin.utils import unquote
 from django.contrib.admin.templatetags.admin_static import static
+from django.contrib.admin.templatetags.admin_urls import add_preserved_filters
+from django.contrib.admin.utils import unquote
+from django.http import HttpResponseRedirect
+from django.urls import NoReverseMatch, reverse
+from django.utils.html import format_html
+from django.utils.safestring import mark_safe
+from django.utils.translation import ugettext_lazy as _
 
-from orchestra.admin.utils import admin_link, admin_date
+from orchestra.admin.utils import admin_date, admin_link
 
 
 class LogEntryAdmin(admin.ModelAdmin):
@@ -34,11 +36,12 @@ class LogEntryAdmin(admin.ModelAdmin):
     user_link = admin_link('user')
     display_action_time = admin_date('action_time', short_description=_("Time"))
 
+    @mark_safe
     def display_message(self, log):
-        edit = '<a href="%(url)s"><img src="%(img)s"></img></a>' % {
+        edit = format_html('<a href="{url}"><img src="{img}"></img></a>', **{
             'url': reverse('admin:admin_logentry_change', args=(log.pk,)),
             'img': static('admin/img/icon-changelink.svg'),
-        }
+        })
         if log.is_addition():
             return _('Added "%(link)s". %(edit)s') % {
                 'link': self.content_object_link(log),
@@ -57,7 +60,6 @@ class LogEntryAdmin(admin.ModelAdmin):
             }
     display_message.short_description = _("Message")
     display_message.admin_order_field = 'action_flag'
-    display_message.allow_tags = True
 
     def display_action(self, log):
         if log.is_addition():
@@ -75,10 +77,9 @@ class LogEntryAdmin(admin.ModelAdmin):
             url = reverse(view, args=(log.object_id,))
         except NoReverseMatch:
             return log.object_repr
-        return '<a href="%s">%s</a>' % (url, log.object_repr)
+        return format_html('<a href="{}">{}</a>', url, log.object_repr)
     content_object_link.short_description = _("Content object")
     content_object_link.admin_order_field = 'object_repr'
-    content_object_link.allow_tags = True
 
     def render_change_form(self, request, context, add=False, change=False, form_url='', obj=None):
         """ Add rel_opts and object to context """
diff --git a/orchestra/contrib/orchestration/admin.py b/orchestra/contrib/orchestration/admin.py
index a5ddcb08..4f5ddc4b 100644
--- a/orchestra/contrib/orchestration/admin.py
+++ b/orchestra/contrib/orchestration/admin.py
@@ -51,19 +51,18 @@ class RouteAdmin(ExtendedModelAdmin):
 
     def display_model(self, route):
         try:
-            return escape(route.backend_class.model)
+            return route.backend_class.model
         except KeyError:
-            return "<span style='color: red;'>NOT AVAILABLE</span>"
+            return mark_safe("<span style='color: red;'>NOT AVAILABLE</span>")
     display_model.short_description = _("model")
-    display_model.allow_tags = True
 
+    @mark_safe
     def display_actions(self, route):
         try:
             return '<br>'.join(route.backend_class.get_actions())
         except KeyError:
             return "<span style='color: red;'>NOT AVAILABLE</span>"
     display_actions.short_description = _("actions")
-    display_actions.allow_tags = True
 
     def formfield_for_dbfield(self, db_field, **kwargs):
         """ Provides dynamic help text on backend form field """
@@ -120,7 +119,6 @@ class BackendOperationInline(admin.TabularInline):
             return _("Deleted {0}").format(operation.instance_repr or '-'.join(
                 (escape(operation.content_type), escape(operation.object_id))))
         return link
-    instance_link.allow_tags = True
     instance_link.short_description = _("Instance")
 
     def has_add_permission(self, *args, **kwargs):
@@ -181,12 +179,10 @@ class ServerAdmin(ExtendedModelAdmin):
     def display_ping(self, instance):
         return mark_safe(self._remote_state[instance.pk][0])
     display_ping.short_description = _("Ping")
-    display_ping.allow_tags = True
 
     def display_uptime(self, instance):
         return mark_safe(self._remote_state[instance.pk][1])
     display_uptime.short_description = _("Uptime")
-    display_uptime.allow_tags = True
 
     def get_queryset(self, request):
         """ Order by structured name and imporve performance """
diff --git a/orchestra/contrib/resources/admin.py b/orchestra/contrib/resources/admin.py
index f758851e..b965c4ee 100644
--- a/orchestra/contrib/resources/admin.py
+++ b/orchestra/contrib/resources/admin.py
@@ -11,6 +11,7 @@ from django.db.models import Q
 from django.shortcuts import redirect
 from django.templatetags.static import static
 from django.utils.functional import cached_property
+from django.utils.html import format_html
 from django.utils.safestring import mark_safe
 from django.utils.translation import ungettext, ugettext_lazy as _
 
@@ -105,10 +106,9 @@ class ResourceAdmin(ExtendedModelAdmin):
 def content_object_link(data):
     ct = data.content_type
     url = reverse('admin:%s_%s_change' % (ct.app_label, ct.model), args=(data.object_id,))
-    return '<a href="%s">%s</a>' % (url, data.content_object_repr)
+    return format_html('<a href="{}">{}</a>', url, data.content_object_repr)
 content_object_link.short_description = _("Content object")
 content_object_link.admin_order_field = 'content_object_repr'
-content_object_link.allow_tags = True
 
 
 class ResourceDataAdmin(ExtendedModelAdmin):
@@ -155,10 +155,9 @@ class ResourceDataAdmin(ExtendedModelAdmin):
         if rdata.used is None:
             return ''
         url = reverse('admin:resources_resourcedata_used_monitordata', args=(rdata.pk,))
-        return '<a href="%s">%s %s</a>' % (url, rdata.used, rdata.unit)
+        return format_html('<a href="{}">{} {}</a>', url, rdata.used, rdata.unit)
     display_used.short_description = _("Used")
     display_used.admin_order_field = 'used'
-    display_used.allow_tags = True
 
     def has_add_permission(self, *args, **kwargs):
         return False
@@ -304,6 +303,7 @@ def resource_inline_factory(resources):
                 self.verbose_name_plural = mark_safe(_("Resources") + ' ' + link)
             return super(ResourceInline, self).get_fieldsets(request, obj)
 
+        @mark_safe
         def display_used(self, rdata):
             update = ''
             history = ''
@@ -329,7 +329,6 @@ def resource_inline_factory(resources):
                 return _("Unknonw %s %s") % (update, history)
             return _("No monitor")
         display_used.short_description = _("Used")
-        display_used.allow_tags = True
 
         def has_add_permission(self, *args, **kwargs):
             """ Hidde add another """